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  1. MariaDB Server
  2. MDEV-29473

UBSAN: Signed integer overflow: X * Y cannot be represented in type 'int' in strings/dtoa.c

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      Description

      Similar to MDEV-28374 but no PROCEDURE ANALYSE() is required here.

      CREATE TABLE t (c DOUBLE) ENGINE=InnoDB;
      INSERT INTO t VALUES ('1e4294967297');
      

      Leads to:

      10.11.0 fe1f8f2c6b6f3b8e3383168225f9ae7853028947 (Debug)

      /test/10.11_dbg_san/strings/dtoa.c:1481:16: runtime error: signed integer overflow: 429496729 * 10 cannot be represented in type 'int'
      

      10.11.0 fe1f8f2c6b6f3b8e3383168225f9ae7853028947 (Debug)

          #0 0x557791cc50de in my_strtod_int /test/10.11_dbg_san/strings/dtoa.c:1481
          #1 0x557791cc50de in my_strtod /test/10.11_dbg_san/strings/dtoa.c:469
          #2 0x557791bb71e2 in my_strntod_8bit /test/10.11_dbg_san/strings/ctype-simple.c:799
          #3 0x55778effb05a in charset_info_st::strntod(char*, unsigned long, char**, int*) const /test/10.11_dbg_san/include/m_ctype.h:899
          #4 0x55778effb05a in Field_real::get_double(char const*, unsigned long, charset_info_st const*, int*) /test/10.11_dbg_san/sql/field.cc:1838
          #5 0x55778effbb02 in Field_double::store(char const*, unsigned long, charset_info_st const*) /test/10.11_dbg_san/sql/field.cc:4868
          #6 0x55778f1c5fdd in Item::save_str_value_in_field(Field*, String*) /test/10.11_dbg_san/sql/item.cc:407
          #7 0x55778f1c641f in Item_string::save_in_field(Field*, bool) /test/10.11_dbg_san/sql/item.cc:6867
          #8 0x55778d4826df in fill_record(THD*, TABLE*, Field**, List<Item>&, bool, bool) /test/10.11_dbg_san/sql/sql_base.cc:9196
          #9 0x55778d482be8 in fill_record_n_invoke_before_triggers(THD*, TABLE*, Field**, List<Item>&, bool, trg_event_type) /test/10.11_dbg_san/sql/sql_base.cc:9251
          #10 0x55778d6a3853 in mysql_insert(THD*, TABLE_LIST*, List<Item>&, List<List<Item> >&, List<Item>&, List<Item>&, enum_duplicates, bool, select_result*) /test/10.11_dbg_san/sql/sql_insert.cc:1089
          #11 0x55778d8fe912 in mysql_execute_command(THD*, bool) /test/10.11_dbg_san/sql/sql_parse.cc:4563
          #12 0x55778d861c88 in mysql_parse(THD*, char*, unsigned int, Parser_state*) /test/10.11_dbg_san/sql/sql_parse.cc:8035
          #13 0x55778d8ce85f in dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) /test/10.11_dbg_san/sql/sql_parse.cc:1894
          #14 0x55778d8e0a70 in do_command(THD*, bool) /test/10.11_dbg_san/sql/sql_parse.cc:1407
          #15 0x55778e351b41 in do_handle_one_connection(CONNECT*, bool) /test/10.11_dbg_san/sql/sql_connect.cc:1418
          #16 0x55778e35432c in handle_one_connection /test/10.11_dbg_san/sql/sql_connect.cc:1312
          #17 0x1474580e9608 in start_thread /build/glibc-SzIz7B/glibc-2.31/nptl/pthread_create.c:477
          #18 0x14745735e132 in __clone (/lib/x86_64-linux-gnu/libc.so.6+0x11f132)
      

      Setup:

      Compiled with GCC >=7.5.0 (I use GCC 9.4.0) and:
          -DWITH_ASAN=ON -DWITH_ASAN_SCOPE=ON -DWITH_UBSAN=ON -DWITH_RAPID=OFF -DWSREP_LIB_WITH_ASAN=ON
      Set before execution:
          export UBSAN_OPTIONS=print_stacktrace=1
      

      Bug confirmed present in:
      MariaDB: 10.3.37 (dbg), 10.3.37 (opt), 10.4.27 (dbg), 10.4.27 (opt), 10.5.18 (dbg), 10.5.18 (opt), 10.6.10 (dbg), 10.6.10 (opt), 10.7.6 (dbg), 10.7.6 (opt), 10.8.5 (dbg), 10.8.5 (opt), 10.9.2 (dbg), 10.9.2 (opt), 10.10.2 (dbg), 10.10.2 (opt), 10.11.0 (dbg), 10.11.0 (opt)

      There are a large number of issues seen across versions. All UniqueID's seen:

      UBSAN|signed integer overflow: X * Y cannot be represented in type 'int'|strings/dtoa.c|my_strtod_int|my_strtod|Field_real::get_double|Field_double::store
      UBSAN|signed integer overflow: X * Y cannot be represented in type 'int'|strings/dtoa.c|my_strtod_int|my_strtod|charset_info_st::strntod|Field_real::get_double
      UBSAN|signed integer overflow: X * Y cannot be represented in type 'int'|strings/dtoa.c|my_strtod_int|my_strtod|my_strntod_8bit|Field_real::get_double
      UBSAN|signed integer overflow: X * Y cannot be represented in type 'int'|strings/dtoa.c|my_strtod_int|my_strtod|my_strntod_8bit|charset_info_st::strntod
      

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              Assignee:
              bar Alexander Barkov
              Reporter:
              Roel Roel Van de Paar
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                Dates

                Created:
                Updated:
                Resolved:

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